DETROIT, MI -- Detroit Police Chief James Craig calls recent criminal allegations made against three of his officers, the latest charges of criminal sexual assault filed against Officer Deon Nunlee, concerning, but not the norm.

Earlier this week, Detroit Police Officer Johnny Ray Bridges was accused of detaining and beating a woman, with whom he'd been drinking earlier on the night of March 3, and firing a gun into the air inside a residence.

On Sunday, Detroit Police Officer Dana Bond, 41, who was already suspended without pay because prior retail fraud charges, is accused of crashing into another vehicle while drunk, injuring two passengers and attempting to flee the scene.

"I'm troubled, certainly this is the type of criminal misconduct that should never happen by any member of this department, or any department for that matter," Craig said while addressing the sexual assault allegations. "I view this as an anomaly; this is certainly is not a trend."

Nunlee, hired by the department in 2008, is accused of responding to the home of a woman claiming she had been assaulted by her boyfriend after 2 a.m. on Oct. 30.

The Wayne County Prosecutor Kym Worthy's Office says Nunlee took the woman away from his partner and the suspect to an upstairs room of the home on the 16000 block of Asbury in Detroit.

Craig said the partner properly separated the individuals, but improperly lost "line of sight" with one another, something Craig said is improper procedure.

Police are not saying exactly what happened next, but the domestic violence victim, whose boyfriend was being arrested downstairs, says she was sexually assaulted.

According to the Wayne County Prosecutor's Office, Nunlee told the woman he'd be returning at 7 a.m., for what the department did not disclose.

Commander Johnny Thomas of the Process Standards Bureau, the section that reviewed the allegations, said the officer never returned to the house.

The department was notified of the alleged crime later the same morning and took the woman to the hospital for a "rape-kit" examination.

Thomas said Nunlee was placed on "Admin.-no gun" duty, which is basically paid desk duty, until the collected DNA, which was sent to the state police Crime Lab immediately after collection, according to Thomas, returned on Feb. 10 and was confirmed to be the officer's, at which time Nunlee was suspended without pay.

Although Detroit police claim the forensic results were received Feb. 10, state police spokesman Shanon Banner said the Crime Lab records show results were release more than two weeks earlier in Jan. 22.

He is now charged with three counts of second-degree criminal sexual assault, sexual assault with intent to penetrate and misconduct in office.

He paid $5,000, 10 percent of the judge-ordered $50,000 surety bond, and was released after his arraignment Friday.

Nunlee has some "minor" infractions in his disciplinary file, "but nothing near this degree," Thomas said Friday. He did not know the nature of the other infractions.

Craig said the recent spurt of alleged crimes committed by police is significantly impacting the public's perception.

"This is not what our police officers do ... it does not represent the 2,500 or so sworn men and women who wear this shade of blue," Craig said. "I think the majority of the public has a great deal of trust and respect in the department."